CVE-2020-19725

HIGH

7.8

CVSS Score

Published: August 22, 2023 at 12:00 AM UTC

Updated: June 17, 2026 at 02:59 AM UTC

1 product affected across 1 vendorZ3

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Severity

HIGH7.8

Exploit prediction

EPSS 1%

SSVC

PoC

Description

There is a use-after-free vulnerability in file pdd_simplifier.cpp in Z3 before 4.8.8. It occurs when the solver attempt to simplify the constraints and causes unexpected memory access. It can cause segmentation faults or arbitrary code execution.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Z3 · Microsoft

95%

v < 4.8.8

Affected range stops below 4.8.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/Z3Prover/z3/issues/3363

References (1)

ExploitIssue TrackingPatchThird Party Advisory

Source: [email protected]

https://github.com/Z3Prover/z3/issues/3363

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-416

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